Top quark mass measurement in single leptonic ttbar events

The mass of the top quark is a crucial parameter both for the Standard Model and for models beyond this. Due to the large Yukawa coupling of the top quark, this mass is a key parameter in testing the electroweak and Higgs sector of the Standard Model. The precise measurement of the top quark mass is one of the main physics goals in understanding the interactions between the elementary particles. The Large Hadron Collider will collect an enormous amount of pp->ttbar events, which will in the semi-leptonic decay mode ttbar->bWbW->bqqblv (l=muon) allow to measure the top quark mass to an unprecedented precision dominated by systematic uncertainties in the jet definition. A top quark mass estimator is constructed and its robustness versus several systematic uncertainties is optimized to reach conservatively a potential precision of better than 2 GeV/c2 which extrapolates to 1 GeV/c2 with a better understanding of the physics of proton collisions at the LHC and the CMS detector.